(U+820C): Use `<-denotational@usage' instead of `<-denotational' for

(U+820C): Use `<-denotational@usage' instead of `<-denotational' for
BUCS+820C; apply new conventions for glyph granularity.
(BUCS+820C): Unify A2-DJT-09636.
(U+820C-itaiji-002): Use `<-denotational@usage' instead of
`<-denotational' for BUCS+820C.
(A-IWDSU+820D): New abstract node; unify IWDS1-0077.
(U+820D): Add `<-denotational' for A-IWDSU+820D; apply new conventions
for glyph granularity.
(U+820E): Likewise.
(A-BC-8CC3-itaiji-002): New abstract node; use `<-denotational' for
A-cgnBC-8CC3; unify A-BC-8CC3-itaiji-003.
(BC-8CC3-itaiji-002): New character; use `<-denotational' for
A-BC-8CC3-itaiji-002.
(BC-8CC3-itaiji-003): Ditto.
(U-000269CF): Use `->subsumptive'.
(A-cgnBC-269D5): New abstract node.
(U-000269D5): Add `<-denotational' for A-cgnBC-269D5; use
`->denotational' and `->subsumptive'.
(U-000269D6): Use `->subsumptive'.
(U+8212): Add `<-denotational@usage' for BUCS+8212; apply new
conventions for glyph granularity.
(U-000269D7): Use `->denotational' and `->subsumptive'.
(U-000269DA): New character.
(U-000269E2): Use `->denotational' and `->subsumptive'.
(U-000269E4): Likewise.
(A-IWDSU+8216): New abstract node.
(U+8216): Add `<-denotational' for A-IWDSU+8216; add
`<-denotational@usage' for BUCS+8216 and A2-DJT-12494; apply new
conventions for glyph granularity.
(U+8217): Add `<-denotational' for A-IWDSU+8216; add
`<-denotational@usage' for BUCS+8216; apply new conventions for glyph
granularity.
(U+8218): Use `<-denotational@usage' instead of `<-denotational' for
BUCS+9928; apply new conventions for glyph granularity.
(HD-IB1067): Unify U+FA6D, MJ030310 and KOSEKI-500720.
(U+821A): Add `<-denotational@usage' for A2-DJT-09641; use
`->denotational' and `->subsumptive'.
(BUCS+820D): New abstract node; unify A2-DJT-09638.
(BUCS+8212): New abstract node; unify A2-DJT-09643.
(BUCS+9928): Unify A2-DJT-13584.
(A2-DJT-09641): New abstract node.
(BUCS+8216): New abstract node; use `<-denotational' for A2-DJT-12494.